31320331203 has 16 divisors (see below), whose sum is σ = 47800005120. Its totient is φ = 17869662336.

The previous prime is 31320331127. The next prime is 31320331223. The reversal of 31320331203 is 30213302313.

It is not a de Polignac number, because 31320331203 - 2¹³ = 31320323011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 31320331203.

It is not an unprimeable number, because it can be changed into a prime (31320331223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1138998 + ... + 1166171.

It is an arithmetic number, because the mean of its divisors is an integer number (2987500320).

Almost surely, 2^31320331203 is an apocalyptic number.

31320331203 is a deficient number, since it is larger than the sum of its proper divisors (16479673917).

31320331203 is a wasteful number, since it uses less digits than its factorization.

31320331203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305826.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 31320331203 its reverse (30213302313), we get a palindrome (61533633516).

The spelling of 31320331203 in words is "thirty-one billion, three hundred twenty million, three hundred thirty-one thousand, two hundred three".